Tektro is nice, but if budget not an issue then why don't you treat yourself with one of these:
Fluke 125B.
Or if you have a particularly generous budget, go and buy the fluke 190.
We got one at work and it's nice. But, not nearly as nice as my micsig scope. Also its user interface isn't that great either. But it's fluke so the input protection is quality.
Sent from my S60 using Tapatalk